Water cooler-heater



FIG. 1 is a perspective view of water cooler-heater showing a new design in use.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a left-side view thereof.

FIG. 5 is a right-side view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for a water cooler-heater, as shown and described. 